This scam of building toll roads in South America has been a lucrative cash grab for our alliance of corporate lawyers—banks—politicians for decades, it is very similar to a Mafia bust-out.
I worked on one for a major NYC law firm in the 90s and it goes something like this:
1) American bankers and lawyers, often with ties to the country in question, go down to a poor area and present a plan for "toll-road privatization" to the corrupt local rulers;
2) The plan involves bribing them up front, both with their cuts of the deal and with them getting to skim off the back end when fees are collected;
3) The road is sold and/or built, with a small amount coming from the outside buyers and a much larger amount coming from the Treasury of the country in question, which pays for the privilege of being fleeced;
4) The road is never used by locals, as they don't have the money to pay and know which back roads to use to avoid it, so the Treasury is on the hook again, as their fees don't cover the debt that must be paid;
5) The American axis of graft has scored enormous legal and consulting fees, plus a permanent stream of funding in a poor country, and escape with many millions, minus the bribes needed to maintain the operation.
I doubt that Trump has noble intentions here (or anywhere), but to continue the Mafia analogy, it's not hard to pursue a legal case against people you know are criminals. Just follow the money, roll up some subordinates, and pretty soon a crime is revealed.
The Blob must be trembling in fear like Jell-O.